Brothers and Sisters Day in Europe
Brothers and Sisters Day on May 31 celebrates the special bond between siblings, encouraging appreciation, reconnection, and the strengthening of family ties.
Sunday
What holiday is on May 31?
16 holidays and observances fall on May 31.
International Flight Attendant Day
International Flight Attendant Day honors the dedication and professionalism of flight attendants, recognizing their vital role in ensuring passenger safety and comfort.
World No Tobacco Day
World No Tobacco Day on May 31 raises awareness about the health risks of tobacco use and promotes actions to achieve a tobacco-free world.
World Parrot Day
World Parrot Day raises awareness about parrot conservation and promotes efforts to protect parrots and their habitats.
Trinity Sunday
Trinity Sunday is observed on the Sunday after Pentecost to honor the Christian doctrine of the Father, Son, and Holy Spirit.
Orthodox Pentecost Sunday
Orthodox Pentecost Sunday is observed seven Sundays after Orthodox Easter to honor the descent of the Holy Spirit.
Web Designer Day
Web Designer Day is observed on May 31 to recognize web designers, user-friendly websites, and digital design work.
National Smile Day
National Smile Day is observed on May 31 to enjoy smiles, kindness, confidence, and healthy oral-care habits.
National Macaroon Day
National Macaroon Day is observed on May 31 to enjoy chewy coconut cookies and classic bakery treats.
National Speak in Complete Sentences Day
National Speak in Complete Sentences Day is observed on May 31 to practice clear grammar and full thoughts in speech and writing.
National Utah Day
National Utah Day is observed on May 31 to recognize Utah’s history, landscapes, people, and Beehive State identity.
Autonomous Vehicle Day
Autonomous Vehicle Day is observed on May 31 to explore self-driving technology, safety, mobility, and future transportation.
National Save Your Hearing Day
National Save Your Hearing Day is observed on May 31 to promote hearing protection, safer listening, and noise awareness.
What You Think Upon Grows Day
What You Think Upon Grows Day is observed on May 31 to focus on positive thinking, gratitude, and personal reflection.
Necrotizing Fasciitis Awareness Day
Necrotizing Fasciitis Awareness Day is observed on May 31 to raise awareness of symptoms, urgent care, and survivor support.
Northumberland Day in England
Northumberland Day in England is observed on the last Sunday of May to celebrate county heritage, landscapes, and local pride.
Coming up next
International Children's Day
Celebrate International Children's Day on June 1st, a global observance dedicated to promoting the rights and well-being of children worldwide.
Global Day of Parents
Celebrate Global Day of Parents on June 1st, honoring the dedication and love parents provide in nurturing their children and shaping society.
World Milk Day
Celebrate World Milk Day on June 1st, recognizing milk's essential role in nutrition, livelihoods, and sustainable agriculture worldwide.
Dinosaur Day
Dinosaur Day is observed on June 1 to explore dinosaurs, fossils, paleontology, and prehistoric life.
World Reef Awareness Day
World Reef Awareness Day is observed on June 1 to raise awareness about coral reefs, ocean health, and reef protection.
World Outlander Day
World Outlander Day is observed on June 1 to honor the Outlander books, TV series, and fan community.
World Narcissistic Abuse Day
World Narcissistic Abuse Awareness Day is observed on June 1 to raise awareness of emotional abuse and survivor support.
Holy Spirit Monday
Holy Spirit Monday is observed after Orthodox Pentecost to honor the Holy Spirit in Orthodox Christian worship.
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